Door lock



Aug. 17, 1943. w. R. scHLAGE DOOR LOCK Filed June '7, 1941 3 Sheets-Sheet l 54 35 4o 24 5o 2e 31 I N V EN TOR. mlm/www?.

TURN

Aug. 17, 1943. w. R. scHLAGE DOOR LOCK Filed June '7, 1941 lunlummmlmmymm 'Illl 5 Sheets-Sheet 2 INVE 0 miam @maar ATTORNE Aug. 17, 1943. w. R. scHLAGE 2,327,071

DoR LOCK Filed June '7, 1941 3 Sheets-Sheet 3 ATToRN Patented Aug. 17, 1943 DOOR LOCK Walter R. Schlage, Burlingame, Calif., assignor to Schlage Lock Company, San Francisco, Calif., a corporation of California Application June 7, 1941, Serial No. 397,058

10 Claims.

This invention relates to a door lock having a latch bolt and a deadlocking mechanism therefor, and especially to a mechanism whereby a key actuated cylinder unit is interlocked with the latch bolt during normal operation of the lock, and which does not permit removal of the cylinder unit from the door except when the door is open and the bolt is thrown to a position beyond its normal operating position.'

The object of the present invention is generally to improve and simplify the installation, construction and operation of locks of the character described; to provide a lock which cannot be removed from the door except by a person in possession of a key; to provide a lock which can be cheaply produced by stamping from sheet metal, and which has a simple throw mechanism embodying a laminated bolt and a deadlocking lever carried thereby which is adapted to a single, double or triple throw, depending on the amount of bolt projection or security desired; to provide a pair of separable housings, one for the reception of the latch bolt and the other for the reception of an actuating mechanism; to provide a retractor plate for the latch bolt, which also functions as a support for the deadlocking mechanism; and further, to provide a retractor plate, which interlocks with the housing in which the actuating mechanism is mounted, to prevent removal of said housing.

The invention is shown by way of illustration in the accompanying drawings, in which Fig. 1 is a central, vertical, longitudinal section of the lock, showing the latch bolt and the deadlocking mechanism carried thereby in an extreme forward position to permit removal of the housing containing the rollback actuating mechanism;

Fig. 2 is a similar section, showing the latch bolt in its fully projected position;

Fig. 3 is a similar section showing the latch bolt in its intermediate position;

Fig. 4 is a. similar section, showing the latch bolt in its fully retracted position;

Fig. 5 is a vertical cross section taken on line V-V of Fig. 4;

Fig. 6 is a horizontal longitudinal section taken on line VI-VI oi.' Fig. 4;

Fig. 7 is a perspective view of a portion of a door, showing the latch bolt housing inserted, and the housing containing the latch bolt actuating mechanism ready to be inserted;

Fig. 8 is a perspective view of the face plate;

Fig. 9 is a perspective view of a reinforcing frame insertable in the latch bolt housing;

Fig. 10 is a perspective view of the latch bolt housing;

Fig. 11 is a perspective view of the retractor plates and the latch bolt;

Fig. 12 is a perspective view of the deadlocking lever;

Fig. 13 is a perspective view of one of the rollback members, and a housing supporting the same;

Fig. 14 is a, perspective view of the housing, which carries the latch bolt actuating mechanism; and v Fig. l5 is a perspective view of a key actuated rollback member.

Referring to the drawings in detail, and particularly to Figs. 1 to 7 inclusive, A indicates a. portion of a door, in the outer edge of which is mortised or otherwise formed a, pocket a provided for the reception of a latch bolt housing generally indicated at B (see Fig. 10); also formed in the door by boring or drilling is a transverse opening c which is provided for the reception of a housing C, containing a latch bolt actuating mechanism.

The housing B may be constructed of sheet metal by punch and die operation, or in any other suitable manner. It has a pair of openings 2-2 formed one in each side, through which the housing C extends, and notches 3-3 are formed in each side to position and to prevent rotation of the housing C, as will hereinafter be described. The housing B is reinforced by a U-shaped frame (see Fig. 9), which consists of upper and lower parallel arms, 4 and 5, and end bar 6, and two right-angular lugs l. A face plate 8 is also provided, and this is secured to the lugs 1 by rivets or counter-sunk screws 9, while the housing B is secured by prongs lli-IO, which are forced into openings II-H formed adjacent the lugs 1.

The housing C is cylindrical in form 'and of suicient length to project beyond the opposite faces of a. door, as shown in Fig. 6, to receive a suitable type of escutcheon plate I2. Lugs 3a are formed in the opposite sides of housing C, and the housing is thus positioned and secured against rotation with relation to the housing B, as the lugs 3a will enter the notches 3.

Means are provided for interlocking the housing C against endwise removal from the door and the housing B, and this is accomplished by forming a cross slot I4 in the housing C, which cooperates with other means hereinafter to be described to form the interlock. The main function of the housing C is to support and secure an actuating mechanism in the form of a pair of rollback members, such as shown at I5 and I6, both or either of which may be key or manually actuated; In Fig. 15, the rollback member is shown in the form of a crank pin I 6, which is secured to the inner end of a key actuated pin tumbler cylinder I1 mounted in a cylinder retaining housing I8; in Figs. 5 and 6, the rollback member I5 is again shown in the form of a crank pin, which is manually operated by means of a turnpiece I9 journalled in a housing 29. Before describing the operation of either rollback member the latch bolt mechanism contained in the housing B will be described. Y

Slidably mounted in the housing B are a pair of retractor plates 24 and 25, which are spaced apart by a plate 26. 'I'his plate and the outer ends of the retractor plates form a latch bolt, which is generally indicated at D. 'I'he retractor plates and the spacing plate are riveted, welded, or otherwise secured with relation to each other to function as a single unit. rhe outer end of the latch bolt D projects through the face plate, and is guided thereby. The inner ends of the retractor plates are notched in their upper edges, as shown at 21 (see Figs. 1 to 3 and 11) to form journals for an antiiriction roller 28, which guides the inner ends of the' retractor plates with relation to the upper arm 4 of the U-shaped frame. Their lower edges have .pairs of vertically disposed slots 30 and 3I formed therein, and disposed between the plates is a lever generally indicated at E. This lever is pivoted at 32. A spring 33 is interposed between the lever and the latch bolt at a point above the pivot, and a lug 34 is formed on the lever, which normally engages a stop pin 35. Below the pivot 32 is a deadlocking lug 36, which is adapted to enter one or another of a plurality of openings 31, 38 and 39 formed in the lower arm 5 of the U-shaped frame, and as such functions as a deadlocking member to deadlock the latch bolt both in its retracted and in its projected positions. 'I'he lever is extended rearwardly as shown at 40 and this portion will under all normal operations extend through the cross-slot of the housing so as to assume a position where it will be engaged by one or another of the rollback pins I5 or I6.

installation and operation of the lock will be as follows: the housing B, together with the latch bolt unit D, is inserted in the mortised opening a formed in the edge of the door and is there secured by means of screws 9, such as shown in Figs. 1 to 3. A pin such as shown in dotted lines in Fig. 2 is then inserted in the slot 46 formed in the lower edge of the opening of the face plate 8. 'I'his pin is then pressed downwardly7 and the inner end will thus function as a lever to raise the deadlocking lever so as to assume the dotted line position shown in Fig. 2. In this position the deadlocking lug 36 clears a stop lug indicated at 41 and the latch bolt unit as a whole may then be pulled outwardly to assume the position shown in Fig. 1, and the pin is removed.

In this position the inner ends of the retractor plates clear the openings 2--2 formed on opposite sides of the latch bolt housings and also the openings c formed in the door. The cylindricalshaped housing C, together with the actuating mechanism mounted therein, may now be inserted. The only care required is that the cross slot I4 be uppermost and that the lugs 3a be so positioned as to enter and register with the notches 3 formed in the opposite sides of the latch bolt housing B. The housing C when inserted will project beyond the opposite face of the door, and by seeing to it that the ends project evenly from opposite faces, centering of the cross slot I4 with relation to the housing B is insured. The latch bolt unit D has, during the insertion of the loci; housing C, assumed the position shown in Fig. l. After the housing C is inserted, the latch bolt unit may be pushed inwardly. In doing so, the deadlocking lug 36 will ride over the stop member 41 but the moment it passes over the lug it will drop down again and in behind the stop lug or into the opening 31 formed in the arm 5 of the U-shaped frame, and as such will assume the position shown in Fig. 2.

This is the full projected position of the latch bolt. To further retract the latch bolt, it is only necessary to rotate the turnpiece I9. The rst revolution of the turnpiece when retracting the latch bolt will move it to the intermediate position shown in Fig. 3, and a second revolution will fully retract it to the position shown in Fig. 4. The latch bolt is guided during projection and retraction by the opening in the face plate and by the anti-friction roller 28 disposed at the rear end of the retractor plates. No lower guide is required, as the pressure is always in an upward direction during operation of the rollback pins.

It has already been stated that during normal operation of the lock three positions oi the latch bolt are assumed. 'I'hese three positions are shown in Figs. 2, 3, and 4. It should be noted by referring to these three positions that the rear ends of the retractor plates ride in the cross slot I 4 formed centrally in the housing C. The extreme forward position of the rear ends of the retractor plates is shown in Fig. 2, and their extreme inner position is shown in Fig. 4. In all these positions the retractor plates are within the cross slot and as such interlocked therewith, thus preventing endwise removal of the housing C. If it is desired to remove the housing C for inspection, repair or otherwise, it can be accomplished by projecting the latch bolt to its foremost position as shown in Fig. 2, and then inserting the pin, as shown in dotted lines in Fig. 2, to engage and lift the deadlocking lever to a position where the deadlocking lug 36 is raised or elevated suilicently to clear the stop 41. At that point the latch bolt may be grasped and pulled outwardly, as shown in Fig. 1, to a point where the rear ends of the retractor plates assume a position forward of the housing C. In this position the housing may be removed.

When the latch bolt is fully retracted, as shown in Fig. 4, and if it is desired to lock the door from the inside, the turnpiece indicated at I9 is grasped and rotated in an anticlockwise direction. When the turnpiece is so rotated it will rotate the rollback pin I5 and this will enter the slot 30. One complete rotation is made, and during that rotation the rollback pin enters the slot, and as it enters it engages the rear extension of the deadlocking lever and raises it, thus lifting and elevating the deadlocking lug with relation to the opening 39. Further movement causes the retractor plates, the deadlocking lever and the latch bolt to move forwardly and when a complete revolution has been made the latch bolt will assume the position shown in Fig. 3, as the rollback pin will release the deadlocking lever and permit it to assume its normal position in engagement with the stop pin 35, and in that position the deadlocking lug will enter the opening 38. The position shown in Fig. 3 is the intermediate position of the latch bolt. It may be advanced from this position to its fully projected position, or that shown in Fig. 2, by again rotating the turnpiece one complete revolution in the same direction. During such. rotation the rollback pin will enter the slot 3| and will again engage the deadlocking lever and raise the deadlocking lug out of the opening 38, and as the rotation proceeds it will advance the whole latch bolt unit to its foremost position, shown in Fig. 2, and will again release the deadlocking lever and thereby permit the deadlocking lug to enter the opening 31. Thus the latch bolt is deadlocked not only in its retracted position but is also deadlocked in the intermediate and in the projected position.

While a manually operated turnpiece is shown on the inside of the door for rotating the rollback pin, key actuated means may be employed on the inside as well as on the outside of the door. Where a key actuated mechanism is employed, the rollback pin will be secured on the inner end of a standard form of pin tumbler cylinder. This in turn will be mounted in the usual type of housing such as shown at I8 (see Figs. 13 and 15) and these housings may be inserted in the ends of the housing C and may be secured there by set screws or any other suitable means. These set screws are preferably positioned n opposite sides of the cross-slot Il of the housing C, or, in other words, at the inner ends of the housings I8, where they cannot be reached even though the escutcheon plates I2 should be removed. Thus the actuating means, whether key or manually actuated, is secured'within the housing C, and this is again secured against removal by the interlocking retractor plates; and as this is the case, no part of the lock mechanism can be removed except by a person in possession of the proper key, as the door must be opened before the latch bolt unit D can be released and extended to the position shown in Fig. 1.

While these and other features of my invention have been more or less specifically described and illustrated, I wish it understood that various changes may be resorted to Within the scope of the appended claims, and that the material andfinish may be such as the experience of the manufacturer and varying conditions of use may demand.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. In a door lock, a housing containing a latch bolt mechanism, asecond housing containing a latch bolt actuating mechanism, said second housing extending transversely through the first housing, a retracting member connected with the latch bolt mechanism and extending through the second housing and forming an interlock therewith to prevent removal of the second housing and the actuating mechanism mounted therein, and spring actuated releasable means maintaining said interlock during normal projection and retraction of the latch bolt by the actuating means, said releasable means being releasable by an implement insertable in the latch bolt housing only when the door in which the lock is mounted is open and when released permitting manual projection of the latch colt and retractor plate to a position where the interlock between the retractor plate and the second housing is released to permit removal of said second housing and the actuating mechanism mounted therein.

2. In a door lock, a latch bolt housing, a latch bolt and a connected retractor plate slidably mounted in said housing, a second housing extending transversely through the latch bolt housing, a transverse slot formed in said second housing through which the retractor plate extends to secure the second named housing against removal from the latch bolt housing, a rollback member carried by the second named housing and engageable with the retractor plate to project or retract the latch bolt, a stop lug in the latch bolt housing, and means on the retractor plate engageable with the stop lug to limit projection of the latch bolt and prevent the retractor plate from passing out of the transverse slot formed in the second named housing.

3. In a door lock, a latch bolt housing, a latch bolt and a connected retractor plate slidably mounted in said housing, a second housing extending transversely through the latch bolt housing, a transverse slot formed in said second housing through which the retractor plate extends to secure the second named housing against removal from the latch bolt housing, a rollback member carried bythe second named housing and engageable with the retractor plate to project or retract the latch bolt, a stop lug in the latch bolt housing, and means on the retractor plate engageable with the stop lug to limit projection of the latch bolt and prevent the retractor plate from passing out of the transverse slot formed in the second named housing, said means on the retractor plate being releasable with relation to the stop lug by an irnplement insertable from the exterior of the housing to permit an extended movement of the latch bolt and retractor plate to a point where the retractor plate passes out of the transverse slot, thereby to permit removal of the second named housing.

4. In a lock of the character described, a housing containing a latch bolt mechanism, a housing containing a latch bolt actuating mechanism, said mechanism being removable, said second housing extending through the rlrst housing, releasable means securing the actuating mechanism from removal from the second housing, said means being releasable only when the second housing is removed from the first housing, a retractor plate in the latch bolt mechanism, said plate extending through the second housing and forming an interlock to prevent removal of the second housing, said latch bolt and retractor plate having a normal limited movement to prevent release of the interlock, and releasable means releasable only by an implement insertable in the rst housing to permit extended movement of the latch bolt and retractor plate to release the interlock.

5. In a door lock, a housing, a latch bolt and a connected retractor plate slidably mounted in the housing, a lever pivotally mounted on the retractor plate, a deadlocking lug on said lever, a plurality of stop members in the housing with which the deadlocking lug engages to deadlock the latch bolt in its projected and retracted positions, key actuated rotatable means for advancing the latch bolt from a retracted to an intermediate projected position during one revolution of the rotatable means, said means simultaneously disengaging the deadlocking lug with relation to an innermost of the stop members to permit said projection of the latch bolt and said means when rotated a second revolution disengaging the deadlocking lug with relation to an intermediate stop member and advancing the latch bolt to a fully projected position, and means manually operable when the latch bolt reaches its fully projected position for releasing the deadlocking lug with relation to an outermost stop member to permit manual removal of the latch bolt and retractor plate from the housing.

6. In a door lock, a housing, a pair of spaced elongated retractor plates slidably mounted in the housing, a plate secured between the forward ends of the retractor plates and forming therewith a latch bolt, a lever pivotally mounted between the retractor plates rearwardly of the latch bolt, a deadlocking lug on said lever, a plurality of stop members in the housing, a spring engageable with the lever normally to maintain the deadlocking lug in engagement with one or another of the stop members, a rst and a second pair of aligned notches formed in the retractor plates adjacent their rear ends, a rollback member adapted to be rotated two revolutions, said rollback member during its first revolution entering the rst pair of notches to advance the latch bolt to an intermediate projected position and simultaneously disengaging the deadlocking lug with relation to an innermost of the stop members to permit said advance of the latch bolt, said rollback member when rotated a second revolution entering the second set of notches to advance the latch =bolt to a fully projected position and disengaging the deadlocking lug with relation to an intermediate stop member to permit said advance of the latch bolt to its fully projected position, and means operable only when the latch bolt reaches its fully projected position for ma-nually releasing the deadlocking lug with relation to an outermost stop 'member to permit removal of the latch bolt and retractor plates from the housing.

7. In a lock of the characterdescribed a pair of housings disposed at right angles to each other in a door and one extending through the other,

a latch bolt slidably mounted in one of the housi-ngs, a retractor plate on the latch bolt extending into the other housing and interlocking therewith to prevent removal of said other housing, manually actuated means for projecting the latch bolt and retractor plate to a full projected position and other means operable when the full projected position of the latch bolt is reached for further projecting the latch bolt and retractor plate to a position where the interlock between the retractor plate and said other housing is released to permit removal of said other housing.

8. In a lock of the character described a pair of housings disposed at right angles to each other in a door and one extending through the other, a latch bolt slidably mounted in one of the housings, a retractor plate on the latch bolt extending into the other housing and interlocking therewith to prevent removal of said other housing, manually actuated means for projecting the latch bolt and retractor plate to a full projected position,A a stop member preventing further projection of the latch bolt and retractor plate by the manually actuated means and other means for releasing the latch bolt and retractor with relation to the stop member to permit further projection of the latch bolt and-retractor plate to a position. Where the interlock between the retractor plate and said other housing is released to permit removal of said other housing.

9. In a door lock, a housing, a latch bolt and a connected retractor plate slidably mounted in the housing, a plurality of stop members in the housing, a deadlocking lever pivotally mounted on the retractor plate and normally engaging one or the other of the stop members to deadlock the latch bolt in its projected or retracted D0- sitions, manually actuated rotatable means i'or advancing the latch bolt from a retracted to an intermediate projected position during one revolution oi the rotated means, said means simultaneously disengaging the deadlocking lever with relation to an innermost of the stop members to permit said projection of the latch bolt, and said means when rotated a second revolution disengaging the deadlocking lug from an intermediate stop member and advancing the latch bolt to a fully projected position, and means operable when the latch lbolt reaches its fully projected position for releasing the deadlocking lever with relation to an outermost stop member to permit manual removal of the latch bolt and retractor plate from the housing.

10. In a door lock, a housing, a latch bolt and a. connected retractor plate slidably mounted in the housing, a lever pivotally mounted on the retractor plate, a deadloeking lug on said lever, a plurality of stop members in the housing with which the deadlocking lug engages to deadlock the latch bolt, a spring engaging the lever to normally maintain engagement of the deadlockin lug with the stop members, a rollback member adapted to be rotated two revolutions, said rollback member during its rst revolution advancine,r the latch bolt from a retracted to an intermediate projected position, said rollback member simultaneously disengaging the deadlocking lug with relation to an innermost of the stop members to permit said projection of the latch bolt, and said rollback member when rotated a second revolution disengaging the deadlocking lug from an intermediate stop member and advancing the latch bolt to a fully projected position, and means operable when the latch bolt reaches its fully projected position for releasing the deadlocking lug with relation to an outermost stop member to permit manual removal of the latch bolt and retractor plate from the housing.

WALTER R. SCHLAGE. 

